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Vehicle radar apparatus having variable output power controlled based on speed of vehicle

A radar device, a technology of output power, applied in the direction of measurement device, reflection/re-radiation of radio waves, utilization of re-radiation, etc., can solve problems such as inability to detect obstacles, and achieve the effect of improving energy efficiency

Inactive Publication Date: 2010-11-03
DENSO CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the radar device is disabled, obstacles in the detection area in front of the vehicle cannot be detected

Method used

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  • Vehicle radar apparatus having variable output power controlled based on speed of vehicle
  • Vehicle radar apparatus having variable output power controlled based on speed of vehicle
  • Vehicle radar apparatus having variable output power controlled based on speed of vehicle

Examples

Experimental program
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Effect test

no. 1 example

[0044] Refer to attached Figures 1 to 8 , the first embodiment according to the present invention will be described below.

[0045] The radar device according to the present invention controls the transmission power of the radar device in response to the speed of the vehicle. In addition, the radar device is configured to have a function of monitoring whether the transmission power of the radar device is within a target range.

[0046] a) First, the general configuration of a vehicle system including the radar apparatus of the first embodiment is described as follows.

[0047] like figure 1 As shown, the vehicle is equipped with a radar device 1, a vehicle speed sensor 3, and a vehicle control unit 5, ie, a vehicle control electronic control unit (ECU). The radar device 1 detects the traveling speed of the preceding vehicle traveling ahead of the host vehicle, the distance from the preceding vehicle, or the like. A vehicle speed sensor 3 detects the running speed of the h...

no. 2 example

[0106] refer to Figures 9 to 10A - 10C, The second embodiment will be described below. However, explanations whose contents are similar to those of the first embodiment are omitted. In the second embodiment, the control process of the radar transmit power is different from that in the first embodiment. Such as Figure 9 As shown in , the main part of the radar apparatus according to the second embodiment is shown. The radar control device 101 includes a controller 103 and a memory section 105 . The FM modulation voltage generation circuit 107 connected to the radar control device 101 outputs a triangular wave, which is sent to the VCO 109 of the MMIC.

[0107] The specific procedures for adjusting the radar transmission power are described as three types of procedures a) to c) as follows. Here is described a process in which the transmission power when the vehicle is in the normal speed state is switched to the transmission power when the vehicle is in the low speed stat...

no. 3 example

[0119] refer to Figures 11 to 13 , the third embodiment will be described below. However, explanations whose contents are similar to those of the first embodiment are omitted. In a third embodiment, the radar transmit power of the radar arrangement is monitored and controlled in response to vehicle speed.

[0120] a) First, configurations for monitoring transmission power and controlling transmission power, which are features of the present invention, are described as follows. Such as Figure 11 As shown, similarly to the first embodiment, the high frequency circuit 111 includes a VCO 113, an amplifier (AMP 1) 115, a frequency divider 117, an amplifier (AMP 2) 119, a transmitting antenna 121, and the like.

[0121] Such as Figure 11 As shown, the transmission power monitoring unit 123 includes a detection diode 125, a differential amplifier 126 and the like. In the emission monitoring unit 123 , the emission power (emission voltage) from the amplifier 119 of the high-fr...

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PUM

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Abstract

A vehicle radar apparatus that controls millimeter-wave radar operation is provided. The radar apparatus is configured to control the radar operation based on the speed of the vehicle. In the radar apparatus, the vehicle speed is detected and the output power of the radar apparatus (radar output power) is controlled such that the radar output power is set with at least two different output power levels in response to the vehicle speed.

Description

technical field [0001] The present invention relates to a radar device, and more particularly, to a radar device controlling a millimeter wave radar. Background technique [0002] Conventionally, a vehicle control unit that automatically controls a running state of a vehicle has been developed. For example, a steady speed travel control unit that controls a vehicle speed to a certain level and an adaptive steady speed travel control unit that tracks a vehicle ahead by maintaining a predetermined distance from the vehicle ahead are known. [0003] Specifically, patent documents such as Japanese Patent Application Laid-Open Nos. 1999-342766, 1997-324666, and 1999-268558 disclose a vehicle control unit that controls tracking of a preceding vehicle. In the vehicle control unit for tracking the vehicle in front, the radar device in the host vehicle detects the distance from the vehicle in front and the traveling speed of the vehicle in front, whereby the vehicle control unit con...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01S13/56G01S13/50G01S13/931
CPCG01S2013/9353G01S13/34G01S7/03G01S13/931G01S7/4008G01S2013/932
Inventor 安藤隆雅
Owner DENSO CORP
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